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Finding the Fourth Proportional to 57.79, 79.72 and 35.97

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Solution

The fourth proportional to 57.79, 79.72 and 35.97 is: 49.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    57.79 : 79.72 = 35.97 : x
  2. Step 2: Convert to fraction form
    57.79/79.72 = 35.97/x
  3. Step 3: Cross multiply
    57.79x = 79.72 × 35.97
  4. Step 4: Simplify right side
    57.79x = 2,867.53
  5. Step 5: Solve for x
    x = 2,867.53/57.79
  6. Step 6: Final answer
    x = 49.62

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.